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Thermodynamic consistency of vapor‐liquid equilibrium data at high pressure
Author(s) -
Bertucco Alberto,
Barolo Massimiliano,
Elvassore Nicola
Publication year - 1997
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690430227
Subject(s) - thermodynamics , supercritical fluid , isothermal process , vapor–liquid equilibrium , consistency (knowledge bases) , equation of state , vapor pressure , chemistry , binary number , activity coefficient , mixing (physics) , thermodynamic equilibrium , aqueous solution , mathematics , physics , geometry , arithmetic , quantum mechanics
A method for testing the thermodynamic consistency of binary and isothermal vapor‐liquid equilibrium data at moderate and high pressures is proposed, using a ϕ‐ϕ approach. The Redlich‐Kwong‐Soave equation of state with Huron‐Vidal mixing rules at infinite pressure is used in the data‐reduction procedure, and a Margules equation is used to calculate the activity coefficients at infinite pressure. This model is shown to be thermodynamically consistent. The proposed method allows us to check consistency of vapor‐liquid equilibrium data in the presence of components at the gaseous and supercritical states.